--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/TypeSystemErrorsTest.java	Thu Aug 29 19:19:00 2013 +0200
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.dsl.test;
+
+import com.oracle.truffle.api.dsl.*;
+
+public class TypeSystemErrorsTest {
+
+    @TypeSystem({int.class, boolean.class})
+    static class Types0 {
+
+    }
+
+    @ExpectError("Invalid type order. The type(s) [java.lang.String] are inherited from a earlier defined type java.lang.CharSequence.")
+    @TypeSystem({CharSequence.class, String.class})
+    static class Types1 {
+
+    }
+
+    @TypeSystem({int.class, boolean.class})
+    static class Types2 {
+
+        @TypeCast
+        @ExpectError("The provided return type \"String\" does not match expected return type \"int\".%")
+        String asInteger(Object value) {
+            return (String) value;
+        }
+
+    }
+
+    @TypeSystem({int.class, boolean.class})
+    static class Types3 {
+
+        @TypeCast
+        @ExpectError("The provided return type \"boolean\" does not match expected return type \"int\".%")
+        boolean asInteger(Object value) {
+            return (boolean) value;
+        }
+
+    }
+
+}